方法一:
abs = function(val){ //金额转换 分->元 保留2位小数 并每隔3位用逗号分开 1,234.56 var str = (val/100).toFixed(2) + ''; var intSum = str.substring(0,str.indexOf(".")).replace( /B(?=(?:d{3})+$)/g, ',' );//取到整数部分 var dot = str.substring(str.length,str.indexOf("."))//取到小数部分搜索 var ret = intSum + dot; return ret; } console.log(abs(2000000)); //输出结果->20,000.00
方法二:
function number_format(number, decimals, dec_point, thousands_sep) { /* * 参数说明: * number:要格式化的数字 * decimals:保留几位小数 * dec_point:小数点符号 * thousands_sep:千分位符号 * */ number = (number + '').replace(/[^0-9+-Ee.]/g, ''); var n = !isFinite(+number) ? 0 : +number, prec = !isFinite(+decimals) ? 0 : Math.abs(decimals), sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep, dec = (typeof dec_point === 'undefined') ? '.' : dec_point, s = '', toFixedFix = function (n, prec) { var k = Math.pow(10, prec); return '' + Math.ceil(n * k) / k; }; s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.'); var re = /(-?d+)(d{3})/; while (re.test(s[0])) { s[0] = s[0].replace(re, "$1" + sep + "$2"); } if ((s[1] || '').length < prec) { s[1] = s[1] || ''; s[1] += new Array(prec - s[1].length + 1).join('0'); } return s.join(dec); }
使用:
var num=number_format(1234567.089, 2, ".", ",");//1,234,567.09
再来一个,直接舍去的办法:
function number_format(number, decimals, dec_point, thousands_sep) { /* * 参数说明: * number:要格式化的数字 * decimals:保留几位小数 * dec_point:小数点符号 * thousands_sep:千分位符号 * */ number = (number + '').replace(/[^0-9+-Ee.]/g, ''); var n = !isFinite(+number) ? 0 : +number, prec = !isFinite(+decimals) ? 0 : Math.abs(decimals), sep = (typeof thousands_sep === 'undefined') ? ',' : thousands_sep, dec = (typeof dec_point === 'undefined') ? '.' : dec_point, s = '', toFixedFix = function (n, prec) { var k = Math.pow(10, prec); return '' + Math.floor(n * k) / k; }; s = (prec ? toFixedFix(n, prec) : '' + Math.floor(n)).split('.'); var re = /(-?d+)(d{3})/; console.log(s) while (re.test(s[0])) { s[0] = s[0].replace(re, "$1" + sep + "$2"); } if ((s[1] || '').length < prec) { s[1] = s[1] || ''; s[1] += new Array(prec - s[1].length + 1).join('0'); } return s.join(dec); } number_format(1234567.089, 2, ".", ",");//1,234,567.08